Hamilton police and RCMP closed a section of highway in Binbrook Friday morning after a second incident involving abandoned barrels suspected of being linked to an illegal drug lab.
Police said Highway 56 from Hall Road to Haldibrook Road was closed for several hours as the hazmat unit removed a number of "small barrels."
All the barrels were sealed and there was no risk to public safety.
On Thursday police closed Trinity Road South from Book Road to Wilson Street after RCMP say chemicals "consistent with a synthetic drug lab" were discovered in several abandoned barrels.
RCMP spokesperson Richard Rollings said he wouldn't specify on the chemical substance found and what it may have been used to create.
"We will continue our analysis and investigation to verify," Rollings said.
Police are looking into the possibility that both incidents are related.
The provincial Ministry of Environment is also investigating the finds.